Boiler



Dec. 5, 1933. P. R, DELLING ET AL BOILER W nemam OOO Patented Dec. 5,V1933 TES UNITED STA PAT `Bo1LEa i Paul R.. Delling, Haddoneld, N. J.,and Hans W.'

Lindemann, Gary, In

signor to said Delling Application October 16,

1 Claim.

The invention relates to improvements in boiler construction.

This boiler construction is especially adapted for steam generation forhigh pressure service for steam driven road vehicles. The objectis toprovide a boiler of maximum strength andv minimumrweight, both of whichcharacteristics being extremely important for such service.

Referring to the drawing, which illustrate merely by Way of examplesuitable means for effecting the inventiom- Fig. 1 is an elevation ofthe boileron the plane of line 1-, 1 of Fig. 2.

Fig. 2 is a. section on the line 2, Figs. 3, 4.and 5 are section largedscale. y

Similar numerals y refer to similar throughout the several views. Thebarrel or cylinder 9 ofthe boiler preferably comprises a section ofhammer-Welded steel tubing. To each end of this barrel 9 is Welded, asat 10, a hanged header, such as 11 and 12'. Over each welded seam, asteel ring v13 is shrunk,l 25 and the ring is also welded, as at 14and'l, to

parts the boiler barrel and to the header, see Fig. 3. f'

The advantage of this construction is that the Welded seams are thusreinforced by the ringsl and the welding associatedtherewith. 30

under working conditions, contains steam and is not exposed to the fire.This part of the boiler therefore is not provided with re tubes.k Inorder to give this part of lthefboiler the required strength, a steelcasting 16, with heavy yand deep anges 1'7, is riveted to the inner sideof each header l1 and 12, and heavy steel stay bolts 18 are threaded ateach end into both the rcastin'g 16 and into the adjacent header. Thesestay a1 details on an en- 9 Approximately the upper third ofv theboi1er, v

d.; said Lindemann as,-

1929. serial No.1399g973 threaded on the outer'end'sv of the stay boltsf with copper washers 20 interposed between the Y,nuts `and the headers.The barrel ofthe boiler iswound with the proper number ofr, layers ofpiano ,wiresgas at 21 (the number of layers de- 60 high-pressure firetube boilers of vsimilar con-70 struction, such as the Stanley boiler,are'eliminated, and great latitude is givenin 'the size of the boiler,Aas hammer-welded steeltubing is commercially available -at from .eightinches to ninety-six inches diameter. The flanged headers 75 arespun andare thus available inalmost any diameter-without the use of a die.`While theweldingl of barrel to headers would ordinarily secure a strongconstructiongand the shrinking of a ring over this weld .will serve as80 a substantial reinforcement, the Welding of the ring both to theheader and ,the barrel gives a i doubler reinforcement Awhich vrendersthe resistg very high pressure unusualthe header and a weld'joini'ng theother Asideof v f the Yring with the barrel, as' and for thev purposedescribedn f etalsheeting 23, such as alur'ni- '65 4o bolts nm from endto end of the bauer. To pre- PAUL R. DELLING.- vent leakage through thethreads of .the stay v:HANS W. LINDEMANN, i,

bolts, and as further reinforcement, nuts 19 are 1 Y

